|
Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Statement of Comprehensive Income [Abstract] | ||
| Unrealized gain (loss) on investments, tax | $ 16 | $ (14) |
| Changes in benefit plan accounts, tax | $ 581 | $ 678 |